Oven for drying cord.



J. D. TEW.

OVEN FUR DRYING CORD.

MPLICATlON FILED MAY 22. \9|5.

Patented Oct. 30, 1917.

2 SHEETS-SHEET I.

E 4& Ebbug Wm J. D. TEW.

OVEN .FOR DRYING CORD APPLICATION FILED MAY 22. 1915.

1,25 O66. Enema Oct. 30,1917.

2 SHEETS-SHEET 2.

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JAMES I). TE'W, O15 AKRON, OHIO, ASSIGHOB TO THE B. F. GOODRICH COMPANY, OF NEW YORK, N. Y., A CORPORATION (3F NELV YDRK.

OVEN F033. DRYING CORD.

Application filed May 22, 1915.

To all whom it may concern:

Be it known that 1, JAMES D. Tnw, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Ovens for Drying Cord, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

Textile cords impregnated with rubber are in use for many purposes. A customary method of impregnating the cord is to employ plastic rubber cement (for example, rubber dissolved in naphtha or benzo e), force the same into and on the outside of the cord, and thereafter dry the cord by passing it through a long heated oven at a rate of speed that permits it to dry thoroughly. Such ovens require large floor space, those heretofore used being from sixty to seventyiive feet long. They require a very large expenditure of steam to heat them, and the solvent is lost by the dissipation of its vapors into the atmosphere.

The object of the present invention is to provide a simple, eiiicient and relatively small apparatus in which cords may be impregnated and dried and the solvent vapors recovered. My apparatus occupies comparatively small space; provides convenient means for impregnatingthe cords and for threading the cords through it; operates to dry the cords rapidly with small expenditure of heat, while they are in transit through the apparatus, and enables the vapors of the solvent, unmixed with air, to be conducted to a suitable point for recovery.

In the drawings, Figure 1 is a side elevation of my apparatus; Figs. 2 and 3 are en'- larged-vertical sections of the apparatus adjacent to the left hand and right hand ends respectively; Figs. 4 and 5 are plans of the left hand and right hand portions of the apparatus respectively, tle cover plates in each case being removed; Fig. 6 is a vertical section substantnilly on the offset line 6-6 of Fig. 2 looking toward the right; Fig. 7 is a vertical section on the line 7-7 of ldig. 3, looking toward the left. i

As shown in the drawings, the body of my apparatus consists of a cylindrical pipe 10 having secured to its ends, in communication with it, rectangular housings or boxes 11 and 12' respectively, which are normally Specification of Letters Patent.

Patented @ct. Si), 191?.

Serial No. 29,775.

closed by cover plates 13 and 14 screwed down on air-tight packing. In the interior of the structure is a heating device, shown as consisting of a pair of pipes 16 and 17 extending through the end Wall of the box 12 and connected together within the box 11 by the return elbow 18. The cords to be impregnated and dried, designated 20, are located in a substantially horizontal plane in the upper portion of the apparatus, passing inwardly through the end wall of the box 11 and outwardly through the end of the box 12. 22 indicates a pipe, connecting a vacuum pump with the interior of the box 11. This pump (which is not shown) may be or" any form capable of maintaining a high degree of vacuum in the apparatus.

Before proceeding to a more detailed description of the apparatus, it will be noted that, if steam is caused to circulate through the pipes 16, 18, 17, and the cords to be treated are drawn through the apparatus, and the vacuum pump is operated, the cords will be dried in transit and the released naphtha or benzole vapor will be drawn oil and may be recovered;

Referring now to the details of the structure shown, the central cylindrical pipe 10 has secured to its ends rings 25, which are secured by bolts 26 to flanges 27 and 28 on the boxes 11 and. 12. The steam pipes pass in through the end wall 30 of the box 12 and each is surrounded by a suitable stuiling box 31. The pipes rest on the central body 10 and are suitably spaced by intermediate blocks 33 and 34 connected by a. distance rod 35.

The drawing shows an apparatus adapted to treat six cords at a. time. Passing into the apparatus these cords extend through alined tubular nipples and ll. These nipples screw into the opposite walls of a small chamber 42 carried by the end wall 45 of the box 11. This chamber is filled with suitable rubber cement under pressure, a pipe 47 (Fig. 6) being shown as supplying the chamber with such cement. The end wall 30 of the box 12 carries-nozzles 50 outer ends 51 to snugly engage the cord as it passes out.

The nozzles have flanges 52 at their other ends by which they may be secured in place by suitable thimbles 5a screwing into the end wall against the flange. The bores of the nipples 4:0 and d1 snugly embrace the entering cords so that the cement under pressure in the chamber 42 does not leak out, but is forced into the body or" the cord. The nozzles are made of rubber or other yielding material to permit the passage of any small lumps of rubher that may be formed on the cord, and at the same time to afl'ord an air-tight passage for the cord.

It will be noticed that the entrance end of the nipples 4:0 and al are tunnel-shaped, as shown at 5'2 and 58, while the bore of the nozzle 56 flares toward its entrance. This permits the cord to be threaded withcomparative ease through the various passages. To enable the cords passed through the nipples $0 and ll to be drawn through the body 10 in position to be threaded through the nozzles 50, 1 provide a very simple transportation device w'thin the drier, which will now be described. The transportation device consists of a rider 60 resting on the steam pipes 16 and 17 and adapted to be drawn along the same in either direction by a. sprocket chain 62. One end of the sprocket chain is anchored to the rider by a bolt 64-; then the chain passes toward the end 30 and around a sprocket wheel 6? mounted in a suitable bracket 68 secured to the bottom of the box 12 and thence in the opposite direction adjacent to the bottom of the apparatus and beneath the space between the steam pipes to a point beyond the return elbow 18. There the chain passes around a sprocket wheel 70 which is keyed on a shaft 71. This shaft is journaled on the sides of the box 11. From the sprocket wheel 70 the chain leads back to the other end of the rider 60, where it is secured by the bolt 7a. (in the end of the shaft 71 on the outside of the apparatus is a suitable crank 76, or other device for turning the shaft. It will be seen that, when the crank is operated the rider may be drawn from either end of the apparatus to the other. The rider is provided with suitable downwardly extending lugs which guide it on the steam pipes, and on its upper side with a set of standards or upward lugs 81 which have eyes 82 adapted to receive the cords.

Tn installing the cords in the apparatus the crank is driven in the direction to carry the rider to its extreme left hand position beneath the cover plate 13. That cover plate is removed by taking out the cap screws 85. The cords are threaded by hand through the nipples a0 and eil and their inner ends are then threaded by hand through the eyes 82, the cords being secured by knotting them beyond the eyes. The removal of the plate 13 allows this to be easily done. Then the crank. is driven in the direction to pull the rider to the opposite end of the apparatus. This draws the set of cords through the nipples l0 and 4:1. ll ith the rider in the position shown in Fig. 3, and the cords as shown in broken lines 20, the plate ll is removed'by loosening the cap screws 86. The cords, one at a time, are freed from the respective standards 81 by removing the knot, and are drawn toward the right by hand and threaded through the nozzles 50. After the threading of the apparatus, the cover plates 13 and ll are secured in position and the oven is ready for operation.

The vacuum pump connected with the outlet-pipe 22 maintains a high degree of vacuum within the apparatus, the nipples l0 and ll and the nozzles 50 preventing material entrance of air at the only points where absolutely tight joints are not maintained. llith a moderate degree of heat the solvents of the rubber evaporate rapidly in the vacuum, and are drawn oil, as the cords are drawn through the drum by any convenient means. Heretofore the cords have been dried in long ovens at atmospheric pressure. My improved apparatus, which need not be more than one-third as long as the open heaters, and uses much les heat, dries the cord just as rapidly, and draws oil the vapors of the solvent with so small an admixture or" air as to render the recovery of the solvent practicable.

Having thus described my invention, what l claim is:

l. The combination of an air-tight chamber, entrance nipples for cords at one end, exit nipples tor the cordsat the other end, the nipples fitting the cord to maintain practically air-tight joints, means for maintaining a substantial vacuum in the cham her while the cords pass therethrough, and means for heating the cords in transit.

i. The combination of a chamber, means for maintaining a substantial vacuum therein. means for guiding a cord into and out of the chamber, means for impregnating the cord as it passes into the chamber, and means for heatin the cord as it passes through the chain er.

3. The combination of an elongated cham ber, removable covers near the ends thereof, there being cord-passageways to and from the chamber in the end walls thereof, said passageways being accessible on the inside by removing the respective covers, and means for heating the cords in transit through the chamber.

l. The combination of a long chamber comparatively small in cross section and havingentrance and exit passageways for cords passing to and from the chamber, the passage-ways being located respectively at the opposite ends of the chamber. a pair or" removable covers respectively near the opposits ends of the chamber to enable access to theinterior adjacent to said passageways, and means within the chamber for heating the cords.

5. The combination of an elongated chamber, removable covers near the ends thereof, said chamber having passageways for cords to and from the upper portion of the chamber in the end walls thereof, said passageways being accessible on the inside by removing the respective covers, and means within the lower portion of the chamber for heating the cords as they pass through.

6. The combination of a casing consisting of an intermediate cylindrical pipe having flanges at its ends and a pair of rectangular boxes in communication with the bore of the pipe and having flanges secured to the flanges of the pipe, there being a series of entrance passageways in the end wall of one of the boxes, and a series of exit passageways in the end wall of the other box.

7 In an apparatus of the class described, the combination of a pipe, boxes at the op posite ends thereof communicating with the interior of the pipe, communicating steam pipes extending through one end of one of the boxes and occupying the pipe first mentioned, there being a series of entrance openings through the end wall of one of the boxes, and-a series of exit openings through the end wall of the other box, each of said series being arranged in a substantially horizontal row in the upper portion of the respective box.

8. The combination of a long substantially air-tight chamber, entrance nipples for cords at one end associated with provision for treating the cords, exit nipples for cords at the other end, the nipples fitting the cord to maintain practically air-tight joints, said nipples being so located as to support the cord in the upper portion of the chamber, steam pipes in the lower portion of the chamber, and means for main taining a substantial vacuum in the chamber while the cords pass through it.

9. The combination of a comparatively long chamber, entrance nipples for cords at one end associated with provision. for treating the cords, said chamber having exit passageways for cords at the other end, means in the chamber for heating the cords, and means for drawing out the vapor-laden air from the chamber. l

10. The combination of a comparatively long chamber, entrance nipples for cords at one end associated with provision for treatmg the cords, said chamber having exit passageways for cords at the other end, said nipples and passageways being so located as to support the cord in the upper portion of the chamber, steam pipes in the lower portion of the chamber, and means for drawing out the vapor-laden air from the chamber 11. The combination of a long chamber comparatively small in cross section, tubular guides carried by the end wall of such chamber, exit tubular guides at the other. end of the chamber, a pair of removable covers near the opposite ends of the chamber to enable access to the inner ends of the guides, and means for maintaining a substantial vacuum within the chamber.

12. The combination with a casing having an end wall, of a transverse chamber located within the end wall, nipples arranged in sets on opposite sides of said chamber, and adapted to direct cords through the chamber, and means for heating cords within the casing.

13. The combination of a cylindrical pipe, boxes secured to the opposite ends thereof and having and walls and removable top portions, and cord guides carried by the end walls.

14.. The combination of a casing consisting of an intermediate cylindrical pipe hav ing flanges at its ends and a pair of rectangular boxes in communication with the bore of the pipe and having flanges secured to the flanges of the pipe, each box providing a bottom, sides and an end, a removable cover plate for each box, a series of tubular guides arranged in a row in the end wall of one of the boxes, and a series of guides arranged in a row in the end wall of the other box.

15. In an apparatus of the class described, the combination of a pipe, boxes at the opposite ends thereof communicating with the interior of the pipe, and communicating steam pipes extending through one end of one oi the boxes and occupying the pipe first mentioned, and there being passageways for cord in the end walls of the two boxes.

16. The eombination of a long casing, a pair of pipes entering one end of the casing and connected by a return elbow adjacent to the other end of the casing, blocks for supporting and positioning said pipes, a distance rod connecting said blocks, and means for guiding cords into and out of the casing.

17. The combination of a casing comprising a comparatively long central. pipe with a pair of boxes at the opposite ends communicating with said pipe, entrance nipples carried by the end wall of one of the boxes, exit nipples carried by the end wall of the other box, and a heating device within the central pipe.

18. The combination of along chamber comparatively small in cross section, a steam pipe in the lower portion of the chamber, and entrance and exit guides for cords carried by the respective ends of the apparatus in a horizontal row.

19. The combination with a casing having an end wall, of a transverse chamber 10- 1 cated Wi hin the end Wall, nipples arranged in on opposite sides of said chamber and communicating therewith, a pipe cominnnieating With-said chamber, means for heating cords within casing, and means for draw ing air out of the casing.

20. in an apparatus of the class described, the combination of a cnamber, means for guiding cord into the chamber and out t, mechanism Within the chamber and operable from outside of it for drawing the cord along the chamber, and means for heating the cord in the chamber,

21. In apparatus of the class deed ibed, the combinatidn of a comparatively long chamber, means for guiding the cord into one end of it and guiding it out of t e other end. means for impregnating the cord as passes into the chamber, a movable device within the chamber to Which the cord may be temporarily anchored, and means "for moving said device from a point near one end of the chamber to a point near the other,

22. The combination of a chamber, means for heating the same, means for guiding cords into and out of the chamber, and a traveling device Within the chamber adapted to have the cords temporarily secured to it, and means for propelling such device from a point near one end oi the chamber to a point near the other end.

23, The combination of a long chamber relatively small in cross section, a heating pipe within said chamber, guides for cor-d entering leaving the chamber, and a traveling device Within the chamber movable from apoint near one end to a point near the other and aoapted to draw the cord along, whereby the apparatus may be conveniently threaded.

2a. In an apparatus of tie class described, the combination of a comparatively long chamber, means for guiding the cord into one end of it and guiding it out of the other end, a movable device Within the chamber to which the cord may be temporarily anchored, means for moving said device from point near one end of the chamber to a point near the other, air-tight removable closures near the opposite ends of the casi 1g, and means for drawing air out of the casing.

The combination or" a long chamber comparatively small in cross section, guides. carried by the end Walls of such chamber, a pair of removable covers near the opposite ends of the chamber to enable access to the inner ends of the respective guides, and a transportation device Within the chamber adapted to draw cords from a point accessible when one cover is removed to a point accessible when the other cover is removed,

26. The combination of a cylindrical pipe, bones secured to the opposite ends thereof and having end Walls and removable top portions, cord guides carried by the end Walls, and transportation device movable throughout the length of said pipe and adapted to pull the cord from'a point adjacent to an en ance guide to a point adjacent to an exi guide,

27. The combination a casing, a pair oi? parallel pipes therein, a rider on said pipes, and means for propelling the rider along the pipes, said casing having entrance and exit passageways for cord.

28. The comb na ion of a casing having entrance and e openings for cords, a

n the casing mounted sprocket chain with over a pair sprocket ls therein, means for rotating one of said sprocket Wheels to circulate chain, and means connected .vith the chain for temporarily holding the cords being threaded.

29. The combination of a casing, a pair of pipes therein, a rider adapted to travel on said pipes, ocket chain anchored to said rider and extending over a pair of sprocket v'heels, means for rotatin one of said Wheels to move the rider lengthwise of the chamber, guides for cords entering and l eav ing the chamber, means on the rider ior holding cords,

30. The combination of a lon chamber comparatively small in cross sectidn, a steam pipe in the lower portion of the chamber, there being entrance and exit passageways to: the cords in the respective ends of the acparatns in a horizontalrovv, a rider above the steam pipe and below the plane of said nassageivays and having means by Whiclfthe cords may be temporarily held, and means ror moving the rider along the chamber.

31. The combination of a casing, a series of entrance nipples carried by one enc Wall of the casing, there I sing exit passageways the Wall at the other end, a trans ortation evlce movable along and Within said casim ind adapted to draw the cords through thld same, means outside ot the casin for propelling said transportation devic e, and removable cover plates secured to I the tivo boxes and enabling access to the interior adgacent to the nipples. The combination or" a casing comprisng'a comparatively long central pipe with a pair of boxes at the opposite ends communieating with the casing, two separated series of entrance nipples carried bv the end Wall of one of the boxes, there being exit passageways in the end Wall of the other box. a transportation device movable along within said central pipe and adapted to draw the cords through the same, means outside of the casing for propelling said transportation device, a pair of steam pipes lying side by side Within the said cehtral pipe and forming a support for the trans portation device.

33. In a device of the character described,

the combination of a casing comprising a and an exit nozzle for the cord made of long intermediate pipe having a pair of communicating boxes at its opposite ends, a pair of steam pipes extending through one end of one of the boxes and occupying the said intermediate pipe and coupled together attheir other ends, a rider resting on said steam pipes and guided to move along them, a sprocket chain connected with the rider and passing between the pipes and occupying an endless course, a pair of centrally located sprocket wheels over which the chain passes, means outside the casing for rotating one of the sprocket wheels, there being entrance and exit passageways to the casing and means carried by the rider to which cords passed throughthe entrance passageways may be temporarily anchored and thus pulled to points adjacent to the exit passageways.

34. The combination of a chamber, means for maintaining-a substantial vacuum therein, means for guiding cord into the chamber, and an exit nozzle for the cord, said nozzle being made of yielding material to maintain a substantially air tight connection and still allow lumps on the cord to pass through.

35. The comblnation of a substantially air tight chamber, entrance nipples for cords at one end thereof, exit nozzles for cords at the other end of the chamber, said nozzles being of rubber or similar material, and

means for maintaining a substantial vacuum in the chamber while the cords are passing through it. v 36. The combination of. a chamber, means for guiding a cord into it, means for impregnating the cord as it passes into the chamber,

rubber or similar material.

37 The combination of a substantially air tight chamber, means for maintaining a substantial vacuum in the same, means for guiding cords into the chamber, means for impregnating such cords as they pass'into the chamber, a series of exit nozzles for the respective cords, said nozzles being made of yielding material to enable lumps to pass while still maintaining a substantially air tight connection, and meansfor heating the cords in transit.

38. The combination of a chamber, means for guiding cord into it,-and an exit nozzle for guiding the cord out of the chamber, said nozzle being made of rubber or similar material and havin an outward flange, and a thimble surrounding the nozzle and bearirig against said flange to hold the nozzle in ace.

39. The combination of an air-tight cham-' signature.

JAMES D. TEW.

Witnesses: WALTER C. MEANS, ILLA N. KIIRN. 

